Local-scale structures across the morphotropic phase boundary in PbZr(1-x) Ti (x) O(3).
Local-scale structures across the morphotropic phase boundary in PbZr(1-x) Ti (x) O(3).
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DOI：
10.1107/s2052252517016633
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发表时间：
2018-01-01
期刊：
影响因子：
3.9
通讯作者：
Ye ZG
中科院分区：
文献类型：
--
作者：
Zhang N;Yokota H;Glazer AM;Keen DA;Gorfman S;Thomas PA;Ren W;Ye ZG
利用中子总散射和对分布函数分析，本文讨论了锆钛酸铅中复杂的局域结构如何影响同形相界的长程平均结构，及其对独特压电性能的影响。锆钛酸铅（PZT）是研究最广泛的压电材料之一，主要是因为其所谓的同形相界（MPB）与其强压电耦合因子之间的“神秘”关系。本文利用配对分布函数分析的结果，研究了 PZT 中复杂的局部结构如何影响整个 MPB 的远程平均结构。在 PZT 中发现了单斜 MC 型结构。平均结构和局部结构中单斜晶系 MA 和 MC 成分之间的一阶变换解释了这些成分周围压电效应的突然变化。针对 PZT 的成分，讨论了极化旋转在增强压电性能中的作用。本研究揭示的结构-性能关系解释了 PZT 的独特性能，并可能适用于新型 MPB 型功能材料的设计。
Using neutron total scattering and pair distribution function analysis, this work discusses how the complex local structure in lead zirconate titanate affects the long-range average structure across the morphotropic phase boundary, and its influence on the unique piezoelectric properties. Lead zirconate titanate (PZT) is one of the most widely studied piezoelectric materials, mainly because of its ‘mysterious’ relationship between the so-called morphotropic phase boundary (MPB) and its strong piezoelectric coupling factor. Using results from a pair distribution function analysis, this paper examines how the complex local structure in PZT affects the long-range average structure across the MPB. A monoclinic MC type structure is discovered in PZT. A first-order transformation between the monoclinic MA and MC components in both the average and local structures explains the sudden change in piezoelectric effect around these compositions. The role of polarization rotation in the enhancement of the piezoelectric properties is discussed with respect to the composition of PZT. The structure–property relationship that is revealed by this study explains the unique properties of PZT, and may be applicable in the design of new MPB-type functional materials.